91132031 has 8 divisors (see below), whose sum is σ = 92252160. Its totient is φ = 90016632.

The previous prime is 91132009. The next prime is 91132043. The reversal of 91132031 is 13023119.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91132031 is a prime.

It is a super-2 number, since 2×91132031² = 16610094148369922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91131994 and 91132012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91132001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50930 + ... + 52688.

It is an arithmetic number, because the mean of its divisors is an integer number (11531520).

Almost surely, 2^91132031 is an apocalyptic number.

91132031 is a deficient number, since it is larger than the sum of its proper divisors (1120129).

91132031 is a wasteful number, since it uses less digits than its factorization.

91132031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 91132031 is about 9546.3098106022. The cubic root of 91132031 is about 450.0115733649.

The spelling of 91132031 in words is "ninety-one million, one hundred thirty-two thousand, thirty-one".